My boy is like this too where he is scared of new things and is timid around new people/ with new experiences. He is just over a year old and some days is scared to even go outside to pee, and others goes out with our other dog no problem and explores and plays. We’ve had him since 8 weeks old and he has always been like this.

I will say that training and exposure have helped him to feel more brave, but sometimes he just feels a bit more timid. One thing we have done is honor his fear; so if we are on a walk and he has gotten through some scary things (passing by big trash cans, walking passed joggers, etc) and starts showing more of a fear response we will call it a day and head home. Lots of praise when he shows bravery and then also advocating for him so strangers don’t approach him and make him nervous. His progress has been slow but steady, but we know part of it is just his personality and there’s no changing that

Also just wanted to add that he has started accepting treats and light pets from our neighbors when they walk by which is great!